Earthquake with magnitude of Md 2.4 on date 23-05-1994 and time 00:29:40 (Italy) in region 2 km NE Norcia (PG)

A magnitude Md 2.4 earthquake occured in region: 2 km NE Norcia (PG), on

  • 22-05-1994 22:29:40 (UTC)
  • 23-05-1994 00:29:40 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 42.809, 13.106 at 25 km depth.

The earthquake was located by: Bollettino Sismico Italiano INGV.

Search earthquakes: Any within 30 km radius

The values of hypocentral coordinates and magnitude may be revised at a later time as more information becomes available.

Municipalities within 20 km from the epicenter

Distances are determinated based on the geographic coordintes of the (Istat).
Municipality Region Dist Inh Cum Inh
Norcia PG 2 4957 4957
Preci PG 10 724 5681
Castelsantangelo sul Nera MC 10 281 5962
Cascia PG 13 3217 9179
Visso MC 14 1107 10286
Ussita MC 15 444 10730
Cerreto di Spoleto PG 15 1075 11805
Arquata del Tronto AP 16 1178 12983
Sellano PG 17 1079 14062
Accumoli RI 17 667 14729
Poggiodomo PG 18 117 14846
Montegallo AP 19 523 15369

Municipalities with at least 50000 inhabitants

An earthquake occurred to
37 Km E of Foligno (57155 inhabitants)
47 Km NE of Terni (111501 inhabitants)
52 Km W of Teramo (54892 inhabitants)
56 Km NW of L'Aquila (69753 inhabitants)
67 Km SE of Perugia (166134 inhabitants)
91 Km W of Montesilvano (53738 inhabitants)
93 Km E of Viterbo (67173 inhabitants)
95 Km NE of Guidonia Montecelio (88673 inhabitants)
96 Km SW of Ancona (100861 inhabitants)
97 Km N of Tivoli (56533 inhabitants)
98 Km W of Pescara (121014 inhabitants)
Recent and historical seismicity
Seismic hazard
Shakemap
Felt maps
Locations history
Type Magnitude Date and Time (UTC) Latitude Longitude Depth (km) Published time (UTC) Author Location ID
Bulletin
Rev1000
Md 2.4
ML-VAX 1.5
1994-05-22
22:29:40
42.809 13.106 25 2013-07-15
08:40:51
Bollettino Sismico Italiano INGV 210079
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 1994-05-22 22:29:40 ± 0.102
Latitude 42.8090 ± 0.0106
Longitude 13.1060 ± 0.0187
Depth (km) 25 ± 2 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-VAX
Event type earthquake
Origin ID 210079

Uncertainty

Field Value
Preferred uncertainty description horizontal uncertainty
Semi-major axis of confidence ellipse (meter)
Semi-minor axis of confidence ellipse (meter)
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi)
Circular confidence region, given by single value of horizontal uncertainty (meter) 1929.9
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 163
Number of associated phases, regardless of their use for origin computation 8
Number of defining phases 8
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.2
Epicentral distance of station closest to the epicenter (degree) 0.00372
Epicentral distance of station farthest from the epicenter (degree) 0.00623
Number of stations at which the event was observed 4
Number of stations from which data was used for origin computation 4
Magnitudes information

Md:2.4

Field Value
Value 2.4
Uncertainty
Num. used stations 4
Type of magnitude Md
Reference to an origin 210079
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2013-01-04 20:17:57

ML:1.5

Field Value
Value 1.5
Uncertainty
Num. used stations 2
Type of magnitude ML
Reference to an origin 210079
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2015-04-28 13:07:13
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
--.ARV.Z. 1994-05-22T22:30:04.58 10.0 undecidable manual SN 350 0.0062 0.27 0.3
--.MNS.Z. 1994-05-22T22:29:59.49 10.0 undecidable manual SG 216 0.0047 -0.13 0.4
--.AQU.Z. 1994-05-22T22:29:58.95 10.0 undecidable manual SG 153 0.0045 0.01 0.5
--.ASS.Z. 1994-05-22T22:29:56.20 10.0 undecidable manual SG 307 0.0037 -0.3 0.3
--.ARV.Z. 1994-05-22T22:29:53.93 10.0 positive manual PN 350 0.0062 -0.14 1.8
--.MNS.Z. 1994-05-22T22:29:51.94 10.0 positive manual PG 216 0.0047 0.57 0.3
--.AQU.Z. 1994-05-22T22:29:50.89 10.0 positive manual PG 153 0.0045 -0.09 2.2
--.ASS.Z. 1994-05-22T22:29:49.54 10.0 positive manual PG 307 0.0037 0.07 2.2
TDMT - Time Domain Moment Tensor
Fault Plane solutions in the area
Download
Type Description Link
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QuakeML - full Event, Origin, FocalMechanism, Amplitude, Arrival, Pick, Station Magnitude Download